import {
  request
} from "../../request/index.js";
import regeneratorRuntime from '../../lib/runtime/runtime';

Page({
  data: {
    goodsObj: {},
    // 商品是否被收藏
    isCollect: false
  },

  // 商品对象
  GoodsInfo: {},

  onShow: function () {
    let pages = getCurrentPages();
    let currentPage = pages[pages.length - 1];
    let options = currentPage.options;
    const {
      goods_id
    } = options;
    this.getGoodsDetail(goods_id);
  },

  // 获取商品详情数据
  async getGoodsDetail(goods_id) {
    const goodsObj = await request({
      url: "/goods/detail",
      data: {
        goods_id
      }
    });
    this.GoodsInfo = goodsObj;
    let collect = wx.getStorageSync("collect") || [];
    let isCollect = collect.some(v => v.goods_id === this.GoodsInfo.goods_id);
    this.setData({
      goodsObj: {
        goods_name: goodsObj.goods_name,
        goods_price: goodsObj.goods_price,
        goods_introduce: goodsObj.goods_introduce.replace(/\.webp/g, '.jpg'),
        pics: goodsObj.pics
      },
      isCollect
    })
  },

  // 点击轮播图 放大预览
  handlePrevewImage(e) {
    const urls = this.GoodsInfo.pics.map(v => v.pics_mid);
    const current = e.currentTarget.dataset.url;
    wx.previewImage({
      current,
      urls
    });

  },

  // 点击 加入购物车
  handleCartAdd() {
    let cart = wx.getStorageSync("cart") || [];
    let index = cart.findIndex(v => v.goods_id === this.GoodsInfo.goods_id);
    if (index === -1) {
      this.GoodsInfo.num = 1;
      this.GoodsInfo.checked = true;
      cart.push(this.GoodsInfo);
    } else {
      cart[index].num++;
    }
    wx.setStorageSync("cart", cart);

    wx.showToast({
      title: '加入成功',
      icon: 'success',
      // true 防止用户 手抖 疯狂点击按钮 
      mask: true
    });
  },

  // 点击 商品收藏图标
  handleCollect() {
    let isCollect = false;
    let collect = wx.getStorageSync("collect") || [];
    let index = collect.findIndex(v => v.goods_id === this.GoodsInfo.goods_id);
    if (index !== -1) {
      collect.splice(index, 1);
      isCollect = false;
      wx.showToast({
        title: '取消成功',
        icon: 'success',
        mask: true
      });
    } else {
      // 没有收藏过
      collect.push(this.GoodsInfo);
      isCollect = true;
      wx.showToast({
        title: '收藏成功',
        icon: 'success',
        mask: true
      });
    }
    wx.setStorageSync("collect", collect);

    // 5 修改data中的属性  isCollect
    this.setData({
      isCollect
    })
  }
})